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No clamp, no stitch: new kidney surgery aims to save more function

NCT ID NCT07141225

Disease control Sponsor: Shao Pengfei Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tests a new surgical technique for removing small kidney tumors (up to 7 cm) using a robot. Instead of clamping the kidney's blood supply and stitching the wound closed, surgeons avoid clamping and use heat and special materials to stop bleeding. The goal is to preserve as much healthy kidney tissue as possible. The trial will enroll 190 adults and measure kidney function after surgery, along with complications and blood loss.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Off-Clamp Sutureless Technique (procedure)
What this could lead to
If successful, this technique could become a standard option for kidney cancer surgery, helping more patients preserve kidney function without increasing risks.
What could go wrong
This is a single-center study with no control group, so results may not apply broadly. The technique is still being tested for larger or more complex tumors, and bleeding or urine leaks remain possible risks.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 190 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2025

Expected to finish

Jun 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 80 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age between 18 and 80 years old, regardless of gender; 2. Radiological findings demonstrating a tumor size of ≤7 cm; 3. Imaging studies showing no evidence of collecting system invasion; 4. Scheduled to undergo robot-assisted partial nephrectomy (RAPN). Exclusion Criteria: 1. Preoperative imaging demonstrating evidence of distant metastasis or lymph node involvement; 2. Unilateral or bilateral multiple lesions not amenable to simultaneous resection; 3. History of prior systemic therapy, including molecular targeted therapy, immunotherapy, or chemotherapy; 4. Intraoperative conversion to radical nephrectomy; 5. Intraoperative conversion to open surgery.

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Conditions

The condition(s) this trial relates to.

kidney cancer renal carcinoma renal cell carcinoma urinary system disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Renal and urinary disorders Renal cancer Renal particial

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • The First Affiliated Hospital of Nanjing Medical University (Jiangsu Provincial People's Hospital)

    RECRUITING

    Nanjing, Jiangsu, 210036, China

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